I had NT-05's on my Cayman S and was pretty happy with them. The rears survived about 18k miles with 6 autocross days and 2 track days before they were down to the wear bars. They had great traction right up to the end. My last hurrah with them was a track day at Watkins Glen.

I'm switching shortly over to my winter tires, but am already planning on my wheel/tire combo for the Spring.

Although I liked the NT-05's, they did get pretty noisy towards the end. I actually didn't mind the ride quality either.

However, I understand that the PSS will be superior in terms of ride quality and noise. And wear, I'd assume?

My question is how much grip will I be sacrificing at the track and autocross with the PSS's? That's my main concern, and the very slightly higher price.

I would have to agree on the AD08 and RE11. Ran both before, the Bridgestones grip very good but get greasy faster than the AD08. Also, the RE11 is the same tire compound as the previous RE01R, they just re-engineered the tread pattern to make it work better. I would say the AD08 is the best street tire I've run for track use. They are also very civil for daily street use, quiet and responsive in the wet but very stiff.

Never ran the PSS before but I have a set on order! Hopefully doesn't get greasy as fast as the RE11. Given the treadwear rating, my expectations are not very high...

I had NT05s on a previous car and I have PSS on my E90. I loooved the turn-in and response of the NT05 and comfort was excellent until you get about halfway through the tread and then they get real loud. If I were a track regular I would definitely consider the NT05 again and it doesn't hurt that they're pretty cheap. Terrible wet tire though.